<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>18968</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>385701</pageFirst>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue>38</issue>
    <volume>26</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2017-03-03</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Growth and evolution of nickel – germanide nanonstructures on Ge(001)</title>
    <parentTitle language="eng">Nanotechnology</parentTitle>
    <identifier type="issn">1361-6528</identifier>
    <identifier type="issn">0957-4484</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Tomasz</firstName>
      <lastName>Grzela</lastName>
    </author>
    <submitter>
      <firstName>Marion</firstName>
      <lastName>Tülling</lastName>
    </submitter>
    <author>
      <firstName>Giovanni</firstName>
      <lastName>Capellini</lastName>
    </author>
    <author>
      <firstName>Wojciech</firstName>
      <lastName>Koczorowski</lastName>
    </author>
    <author>
      <firstName>Markus Andreas</firstName>
      <lastName>Schubert</lastName>
    </author>
    <author>
      <firstName>Ryszard</firstName>
      <lastName>Czajka</lastName>
    </author>
    <author>
      <firstName>Neil J.</firstName>
      <lastName>Curson</lastName>
    </author>
    <author>
      <firstName>Inga</firstName>
      <lastName>Heidmann</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Schmidt</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Schröder</lastName>
    </author>
    <collection role="institutes" number="1521">FG Halbleitermaterialien</collection>
  </doc>
  <doc>
    <id>23373</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>8</pageNumber>
    <edition/>
    <issue>1</issue>
    <volume>3</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2019-01-25</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Growth and structure of singly oriented single-layer tungsten disulfide on Au(111)</title>
    <abstract language="eng">A singly oriented, single layer of tungsten disulfide (WS2) was epitaxially grown on Au(111) and characterized at the nanoscale by combining photoelectron spectroscopy, photoelectron diffraction, and low-energy electron microscopy. Fast x-ray photoelectron spectroscopy revealed that the growth of a single crystalline orientation is triggered by choosing a low W evaporation rate and performing the process with a high temperature of the substrate. Information about the single orientation of the layer was obtained by acquiring x-ray photoelectron diffraction patterns, revealing a 1H polytype for the WS2 layer and, moreover, determining the structural parameters and registry with the substrate. The distribution, size, and orientation of the WS2 layer were further ascertained by low-energy electron microscopy.</abstract>
    <parentTitle language="eng">Physical Review Materials</parentTitle>
    <identifier type="doi">10.1103/PhysRevMaterials.3.014003</identifier>
    <identifier type="issn">2475-9953</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">014003</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <author>
      <firstName>Luca</firstName>
      <lastName>Bignardi</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Daniel</firstName>
      <lastName>Lizzit</lastName>
    </author>
    <author>
      <firstName>Harsh</firstName>
      <lastName>Bana</lastName>
    </author>
    <author>
      <firstName>Elisabetta</firstName>
      <lastName>Travaglia</lastName>
    </author>
    <author>
      <firstName>Paolo</firstName>
      <lastName>Lacovig</lastName>
    </author>
    <author>
      <firstName>Charlotte E.</firstName>
      <lastName>Sanders</lastName>
    </author>
    <author>
      <firstName>Maciej</firstName>
      <lastName>Dendzik</lastName>
    </author>
    <author>
      <firstName>Matteo</firstName>
      <lastName>Michiardi</lastName>
    </author>
    <author>
      <firstName>Marco</firstName>
      <lastName>Bianchi</lastName>
    </author>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Alessandro</firstName>
      <lastName>Baraldi</lastName>
    </author>
    <author>
      <firstName>Rosanna</firstName>
      <lastName>Larciprete</lastName>
    </author>
    <author>
      <firstName>Philip</firstName>
      <lastName>Hofmann</lastName>
    </author>
    <author>
      <firstName>Silvano</firstName>
      <lastName>Lizzit</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>tungsten disulfide (WS2)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Au (111)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>photoelectron spectroscopy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>photoelectron diffraction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron microscopy</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>23376</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>110</pageFirst>
    <pageLast>114</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>51</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2019-01-25</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Nucleation, morphology, and structure of sub‐nm thin ceria islands on Rh(111)</title>
    <abstract language="eng">The early stages of ceria growth on Rh(111) at high temperature have been investi-gated by low‐energy electron microscopy and photoemission electron microscopy. Ceria was deposited by reactive Ce deposition at substrate temperatures between 700°C and 900°C in an oxygen ambient of 5 × 10−7 Torr. At 700°C, we observe a high nucleation density of 100‐nm‐sized islands. With elevated temperature, the average island size increases, and the nucleation density decreases. Triangularly shaped islands nucleate preferentially at step edges, with seemingly abrupt interfaces between Ce and Rh. At 900°C, the island edges are still straight, but during growth the islands lose their triangular form. Instead, growth along the substrate step edges becomes favorable, leading to a maze‐like morphology. Atomic force microscopy reveals islands of 0.3 to 0.6‐nm height, consistent with ceria islands formed by one or two trilayers (O―Ce―O) of ceria. Moreover, the second layer of the islands is also triangularly shaped, with lateral dimensions of 50 nm and similar step heights. IV‐LEEM analysis leads to the conclusion that the rhodium surface is covered by a layer of reduced cerium oxide, which is partially overgrown by smaller islands of CeO2.</abstract>
    <parentTitle language="eng">Surface and Interface Analysis</parentTitle>
    <identifier type="doi">10.1002/sia.6567</identifier>
    <identifier type="issn">0142-2421</identifier>
    <identifier type="issn">1096-9918</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Jan</firstName>
      <lastName>Höcker</lastName>
    </author>
    <author>
      <firstName>Jerzy T.</firstName>
      <lastName>Sadowski</lastName>
    </author>
    <author>
      <firstName>Sanjaya D.</firstName>
      <lastName>Senanayake</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>ceria</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Rh (111)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low‐energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>photoemission electron microscopy (PEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>IV-LEEM</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>23505</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>11</pageNumber>
    <edition/>
    <issue/>
    <volume>7</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2019-02-13</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Dynamics of the Interaction Between Ceria and Platinum During Redox Processes</title>
    <abstract language="eng">The work is focused on understanding the dynamics of the processes which occur at the interface between ceria and platinum during redox processes, by investigating an inverse catalytic model system made of ceria epitaxial islands and ultrathin films supported on Pt(111). The evolution of the morphology, structure and electronic properties is analyzed in real-time during reduction and oxidation, using low-energy electron microscopy and spatially resolved low-energy electron diffraction. The reduction is induced using different methods, namely thermal treatments in ultra-high vacuum and in H2 as well as deposition of Ce on the oxide surface, while re-oxidation is obtained by exposure to oxygen at elevated temperature. The use of two different epitaxial systems, continuous films and nanostructures, allows determining the influence of platinum proximity on the stabilization of the specific phases observed. The factors that limit the reversibility of the observed modifications with the different oxidation treatments are also discussed. The obtained results highlight important aspects of the cerium oxide/Pt interaction that are relevant for a complete understanding of the behavior of Pt/CeO2 catalysts.</abstract>
    <parentTitle language="eng">Frontiers in Chemistry</parentTitle>
    <identifier type="doi">10.3389/fchem.2019.00057</identifier>
    <identifier type="issn">2296-2646</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">57</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <author>
      <firstName>Paola</firstName>
      <lastName>Luches</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Gabriele</firstName>
      <lastName>Gasperi</lastName>
    </author>
    <author>
      <firstName>Marc</firstName>
      <lastName>Sauerbrey</lastName>
    </author>
    <author>
      <firstName>Sergio</firstName>
      <lastName>Valeri</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>cerium oxide</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>platinum</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low‐energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron diffraction (LEED)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>reduction</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>23840</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>7097</pageFirst>
    <pageLast>7109</pageLast>
    <pageNumber/>
    <edition/>
    <issue>12</issue>
    <volume>123</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2019-04-01</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Growth of Epitaxial 3,4,9,10-Perylene Tetracarboxylic Dianhydride on Bi-Terminated Silicon</title>
    <abstract language="eng">The epitaxial quality of thin films crucially depends on their interaction with the substrate. Up to now, Ag-terminated Si(111) has been employed as the model substrate for the growth of 3,4,9,10-perylene tetracarboxylic dianhydride&#13;
(PTCDA) on semiconductors. In this study, we will show that Bi termination results in PTCDA films of superior epitaxial quality. We have studied the growth of PTCDA on bismuth-passivated Si(111) in detail by means of spot profile analysis of low-energy electron diffraction (SPA-LEED), X-ray photoemission spectroscopy (XPS), near-edge X-ray absorptionfine structure&#13;
(NEXAFS), and scanning tunneling microscopy (STM). The XPS results reveal the presence of intact PTCDA molecules on the surface upon adsorption. NEXAFS data indicate the PTCDA molecules being oriented with their molecular plane parallel to&#13;
the surface. STM shows a very smooth growth front of the PTCDA film, preserving the step structure of the substrate. High-resolution SPA-LEED data demonstrate the presence of a multidomain surface with a rich variety of PTCDA surface structures,&#13;
which were identified to be most prominently herring-bone polytypes. However, in the monolayer range, quadratic brick-wall structures and a nearly square-like structure as well as a perylene-like structure have also been found. Despite the simultaneous&#13;
presence of multiple domains, the individual domains show excellent lateral ordering, with larger domain sizes as compared to the case of Ag-terminated Si(111).</abstract>
    <parentTitle language="eng">Journal of Physical Chemistry C</parentTitle>
    <identifier type="doi">10.1021/acs.jpcc.8b10396</identifier>
    <identifier type="issn">1932-7447</identifier>
    <identifier type="issn">1932-7455</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Schmidt</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Christian</firstName>
      <lastName>Ahrens</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Cherno</firstName>
      <lastName>Jaye</lastName>
    </author>
    <author>
      <firstName>Daniel A.</firstName>
      <lastName>Fischer</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>dianhydride</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Bi-terminated silicon</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>spot profile analysis of low-energy electron diffraction (SPA-LEED)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>X-ray photoemission spectroscopy (XPS)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>near-edge X-ray absorptionfine structure (NEXAFS)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>scanning tunneling microscopy (STM)</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>25015</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>8</pageNumber>
    <edition/>
    <issue>50</issue>
    <volume>15</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2020-01-10</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Wafer-Scale Synthesis of Graphene on Sapphire: Toward Fab-Compatible Graphene</title>
    <abstract language="eng">The adoption of graphene in electronics, optoelectronics, and photonics is hindered by the difficulty in obtaining high‐quality material on technologically relevant substrates, over wafer‐scale sizes, and with metal contamination levels compatible with industrial requirements. To date, the direct growth of graphene on insulating substrates has proved to be challenging, usually requiring metal‐catalysts or yielding defective graphene. In this work, a metal‐free approach implemented in commercially available reactors to obtain high‐quality monolayer graphene on c‐plane sapphire substrates via chemical vapor deposition is demonstrated. Low energy electron diffraction, low energy electron microscopy, and scanning tunneling microscopy measurements identify the Al‐rich reconstruction of sapphire to be crucial for obtaining epitaxial graphene. Raman spectroscopy and electrical transport measurements reveal high‐quality graphene with mobilities consistently above 2000 cm2 V−1 s−1. The process is scaled up to 4 and 6 in. wafers sizes and metal contamination levels are retrieved to be within the limits for back‐end‐of‐line integration. The growth process introduced here establishes a method for the synthesis of wafer‐scale graphene films on a technologically viable basis.</abstract>
    <parentTitle language="eng">Small</parentTitle>
    <identifier type="doi">10.1002/smll.201904906</identifier>
    <identifier type="issn">1613-6810</identifier>
    <identifier type="issn">1613-6829</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">1904906</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <author>
      <firstName>Neeraj</firstName>
      <lastName>Mishra</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Stiven</firstName>
      <lastName>Forti</lastName>
    </author>
    <author>
      <firstName>Filippo</firstName>
      <lastName>Fabbri</lastName>
    </author>
    <author>
      <firstName>Leonardo</firstName>
      <lastName>Martini</lastName>
    </author>
    <author>
      <firstName>Clifford</firstName>
      <lastName>McAleese</lastName>
    </author>
    <author>
      <firstName>Ben R.</firstName>
      <lastName>Conran</lastName>
    </author>
    <author>
      <firstName>Patrick R.</firstName>
      <lastName>Whelan</lastName>
    </author>
    <author>
      <firstName>Abhay</firstName>
      <lastName>Shivayogimath</lastName>
    </author>
    <author>
      <firstName>Bjarke S.</firstName>
      <lastName>Jessen</lastName>
    </author>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Ilirjan</firstName>
      <lastName>Aliaj</lastName>
    </author>
    <author>
      <firstName>Stefano</firstName>
      <lastName>Roddaro</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Peter</firstName>
      <lastName>Bøggild</lastName>
    </author>
    <author>
      <firstName>Kenneth B. K.</firstName>
      <lastName>Teo</lastName>
    </author>
    <author>
      <firstName>Camilla</firstName>
      <lastName>Coletti</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>graphene on insulator</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>interface</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>metal free</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>sapphire</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>wafer scale</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>25162</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>11</pageNumber>
    <edition/>
    <issue/>
    <volume>694</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2020-01-24</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Adsorption of sulfur on Si(111)</title>
    <abstract language="eng">The adsorption of S on Si(111)- 7 × 7 has been investigated for different preparation schemes and parameters. S was supplied from an electrochemical Ag2S cell. For room temperature adsorption and subsequent annealing, no ordered S induced reconstruction can be observed with spot profile analysis low-energy electron diffraction (SPALEED). S deposition at temperatures above about 400°C, however, leads to a well-ordered reconstruction.&#13;
Judging from the LEED pattern, the same reconstruction was already observed by Metzner et al. [Surf. Sci. 377–379(1997) 71–74] who identified it as 4 × 4 reconstruction. The upper temperature limit for the pre-paration of this superstructure depends on S flux, which is needed to compensate for desorption. Prolonged S exposure leads to surface roughening, as observed with SPALEED and scanning tunneling microscopy (STM), pointing to surface etching by S. From our SPALEED data, we can conclude that the observed reconstruction is&#13;
not a 4 × 4 reconstruction, but a 20/12 superstructure with a rectangular unit cell that exists in three rotational domains, as confirmed by STM. Different structural trial models have been assessed with density functional theory. Among these model structures, a  configuration with dimers adsorbed on bridging sites, with a S coverage of 1 monolayer, is most likely, since it is energetically favorable and is in agreement with all experimental&#13;
results.</abstract>
    <parentTitle language="eng">Surface Science</parentTitle>
    <identifier type="doi">10.1016/j.susc.2019.121561</identifier>
    <identifier type="issn">0039-6028</identifier>
    <identifier type="issn">1879-2758</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">121561</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Schmidt</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <author>
      <firstName>Gunnar</firstName>
      <lastName>Schönhoff</lastName>
    </author>
    <author>
      <firstName>Tim Oliver</firstName>
      <lastName>Wehling</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Passivation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Low-energy electron diffraction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Scanning tunneling microscopy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Density functional theory</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Auger electron spectroscopy</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>25551</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>255</pageFirst>
    <pageLast>264</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>385</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2020-04-06</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Reaction dynamics of metal/oxide catalysts: Methanol oxidation at vanadium oxide films on Rh(111) from UHV to 10-2 mbar</title>
    <abstract language="eng">Recent advances in in situ microscopy allow to follow the reaction dynamics during a catalytic surface reaction from ultra-high vacuum to 0.1 mbar, thus bridging a large part of the pressure gap.&#13;
Submonolayer vanadium oxide films on Rh(111) have been studied during catalytic methanol oxidation in situ with spatially resolving imaging techniques. At 10-6 to 10-4 mbar VOx condenses into macroscopic circular islands that exhibit a substructure, consisting of a reduced island core and an oxidized outer ring. This substructure arises due to an oxygen gradient inside the VOx islands, which results in different coexisting 2D-phases of VOx on Rh(111). This substructure is also responsible for a "breathing-like" oscillatory expansion and contraction that the islands undergo under stationary conditions. Using density functional theory, the 2D-phase diagram of VOx on Rh(111) has been computed. The oscillatory behavior can be understood as a periodic phase transition between two 2D phases of VOx. With a newly developed near ambient pressure – low-energy electron microscope, it was shown that VOx islands disintegrate at 10-2&#13;
mbar, resulting in turbulent dynamics.</abstract>
    <parentTitle language="eng">Journal of Catalysis</parentTitle>
    <identifier type="doi">10.1016/j.jcat.2020.03.016</identifier>
    <identifier type="issn">0021-9517</identifier>
    <identifier type="issn">1090-2694</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Bernhard von</firstName>
      <lastName>Boehn</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Christopher</firstName>
      <lastName>Penschke</lastName>
    </author>
    <author>
      <firstName>Xiaoke</firstName>
      <lastName>Li</lastName>
    </author>
    <author>
      <firstName>Joachim</firstName>
      <lastName>Paier</lastName>
    </author>
    <author>
      <firstName>Joachim</firstName>
      <lastName>Sauer</lastName>
    </author>
    <author>
      <firstName>Jon-Olaf</firstName>
      <lastName>Krisponeit</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Helder</firstName>
      <lastName>Marchetto</lastName>
    </author>
    <author>
      <firstName>Torsten</firstName>
      <lastName>Franz</lastName>
    </author>
    <author>
      <firstName>Gerhard</firstName>
      <lastName>Lilienkamp</lastName>
    </author>
    <author>
      <firstName>Ronald</firstName>
      <lastName>Imbihl</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Vanadium oxide</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Methanol oxidation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Inverse catalyst</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Restructuring</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Near ambient pressure low-energy electron microscope</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Heterogeneous catalysis</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Pressure gap</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>25538</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2734</pageFirst>
    <pageLast>2741</pageLast>
    <pageNumber/>
    <edition/>
    <issue>4</issue>
    <volume>20</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2020-04-03</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Massively Strained VO2 Thin Film Growth on RuO2</title>
    <abstract language="eng">Strain engineering vanadium dioxide thin films is one way to alter this material’s characteristic first order transition from semiconductor to metal. In this study, we extend the exploitable strain regime by utilizing the very large lattice mismatch of 8.78% occurring in the VO2/RuO2 system along the c axis of the rutile structure. We have grown VO2 thin films on single-domain RuO2 islands of two distinct surface orientations by atomic oxygen-supported reactive molecular beam epitaxy (MBE). These films were examined by spatially resolved photoelectron and X-ray absorption spectroscopy, confirming the correct stoichiometry. Low energy electron diffraction then reveals the VO2 films grow indeed fully strained on RuO2(110), exhibiting a previously unreported (2 × 2) reconstruction. On TiO2(110) substrates, we reproduce this reconstruction and attribute it to an oxygen-rich termination caused by the high oxygen chemical potential. On RuO2(100), on the contrary, the films grow fully relaxed. Hence, the presented growth method allows for simultaneous access to a remarkable strain window ranging from bulk-like structures to massively strained regions.</abstract>
    <parentTitle language="eng">Crystal Growth &amp; Design</parentTitle>
    <identifier type="doi">10.1021/acs.cgd.0c00120</identifier>
    <identifier type="issn">1528-7483</identifier>
    <identifier type="issn">1528-7505</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Simon</firstName>
      <lastName>Fischer</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Jon-Olaf</firstName>
      <lastName>Krisponeit</lastName>
    </author>
    <author>
      <firstName>Michael</firstName>
      <lastName>Foerster</lastName>
    </author>
    <author>
      <firstName>Lucia</firstName>
      <lastName>Aballe</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>strain engineering</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>vanadium dioxide (VO2)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>ruthenium dioxide (RuO2)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>reactive molecular beam epitaxy (MBE)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>photoemission electron microscopy (PEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low energy electron diffraction (LEED)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>XPEEM</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>µLEED</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>25909</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>11</pageNumber>
    <edition/>
    <issue>7</issue>
    <volume>257</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2020-08-13</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Quasicrystals and their Approximants in 2D Ternary Oxides</title>
    <abstract language="eng">2D oxide quasicrystals (OQCs) are recently discovered aperiodic, but well-ordered oxide interfaces. In this topical review, an introduction to these new thin-film systems is given. The concept of quasicrystals and their approximants is explained for BaTiO3 and SrTiO3 derived OQCs and related periodic structures in these 2D oxides. In situ microscopy unravels the high-temperature formation process of OQCs on Pt(111). The dodecagonal structure is discussed regarding tiling statistics and tiling decoration based on the results of atomically resolved scanning tunneling microscopy and various diffraction techniques. In addition, angle-resolved ultraviolet photoemission spectroscopy and X-ray photoelectron spectroscopy results prove a metallic character of the 2D oxide.</abstract>
    <parentTitle language="eng">Physia Status Solidi B</parentTitle>
    <identifier type="doi">10.1002/pssb.201900624</identifier>
    <identifier type="issn">0370-1972</identifier>
    <identifier type="issn">1521-3951</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">1900624</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Stefan</firstName>
      <lastName>Förster</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Sebastian</firstName>
      <lastName>Schenk</lastName>
    </author>
    <author>
      <firstName>Eva Maria</firstName>
      <lastName>Zollner</lastName>
    </author>
    <author>
      <firstName>Oliver</firstName>
      <lastName>Krahn</lastName>
    </author>
    <author>
      <firstName>Cheng-Tien</firstName>
      <lastName>Chiang</lastName>
    </author>
    <author>
      <firstName>Florian O.</firstName>
      <lastName>Schumann</lastName>
    </author>
    <author>
      <firstName>Alireza</firstName>
      <lastName>Bayat</lastName>
    </author>
    <author>
      <firstName>Karl-Michael</firstName>
      <lastName>Schindler</lastName>
    </author>
    <author>
      <firstName>Martin</firstName>
      <lastName>Trautmann</lastName>
    </author>
    <author>
      <firstName>René</firstName>
      <lastName>Hammer</lastName>
    </author>
    <author>
      <firstName>Klaus</firstName>
      <lastName>Meinel</lastName>
    </author>
    <author>
      <firstName>Waheed A.</firstName>
      <lastName>Adeagbo</lastName>
    </author>
    <author>
      <firstName>Wolfram</firstName>
      <lastName>Hergert</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Martin</firstName>
      <lastName>Ellguth</lastName>
    </author>
    <author>
      <firstName>Christian</firstName>
      <lastName>Tusche</lastName>
    </author>
    <author>
      <firstName>Marc</firstName>
      <lastName>DeBoissieu</lastName>
    </author>
    <author>
      <firstName>Matthias</firstName>
      <lastName>Muntwiler</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Gerber</lastName>
    </author>
    <author>
      <firstName>Wolf</firstName>
      <lastName>Widdra</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>approximants</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>dodecagonal oxide quasicrystals</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>oxide quasicrystals</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>tiling statistics</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>26677</id>
    <completedYear/>
    <publishedYear>2020</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>8</pageNumber>
    <edition/>
    <issue/>
    <volume>10</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-01-07</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The morphology of VO2/TiO2(001): terraces, facets, and cracks</title>
    <abstract language="eng">Vanadium dioxide (VO2) features a pronounced, thermally-driven metal-to-insulator transition at 340 K. Employing epitaxial stress on rutile TiO2(001) substrates, the transition can be tuned to occur close to room temperature. Striving for applications in oxide-electronic devices, the lateral homogeneity of such samples must be considered as an important prerequisite for efforts towards miniaturization. Moreover, the preparation of smooth surfaces is crucial for vertically stacked devices and, hence, the design of functional interfaces. Here, the surface morphology of VO2/TiO2(001) films was analyzed by low-energy electron microscopy and diffraction as well as scanning probe microscopy. The formation of large terraces could be achieved under temperature-induced annealing, but also the occurrence of facets was observed and characterized. Further, we report on quasi-periodic arrangements of crack defects which evolve due to thermal stress under cooling. While these might impair some applicational endeavours, they may also present crystallographically well-oriented nano-templates of bulk-like properties for advanced approaches.</abstract>
    <parentTitle language="eng">Scientific Reports</parentTitle>
    <identifier type="issn">2045-2322</identifier>
    <identifier type="doi">10.1038/s41598-020-78584-9</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">22374</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Jon-Olaf</firstName>
      <lastName>Krisponeit</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Simon</firstName>
      <lastName>Fischer</lastName>
    </author>
    <author>
      <firstName>Sven</firstName>
      <lastName>Esser</lastName>
    </author>
    <author>
      <firstName>Vasily</firstName>
      <lastName>Moshnyaga</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Schmidt</lastName>
    </author>
    <author>
      <firstName>Louis F. J.</firstName>
      <lastName>Piper</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Vanadium dioxide (VO2)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>rutile TiO2(001)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>metal-to-insulator transition</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>morphology</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>crystallography</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron diffraction (LEED)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>scanning probe microscopy</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>27583</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>9</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-06-22</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The Transition From MoS2 Single-Layer to Bilayer Growth on the Au(111) Surface</title>
    <abstract language="eng">The transition from single-layer to bilayer growth of molybdenum disulfide on the Au(111) surface is investigated by in situ low-energy electron and photoemission microscopy. By mapping the film morphology with nanometer resolution, we show that a MoS2 bilayer forms at the boundaries of single-layer single-domain MoS2 islands and next to merging islands whereas bilayer nucleation at the island centers is found to be suppressed, which may be related to the usage of dimethyl disulfide as sulfur precursor in the growth process. This approach, which may open up the possibility of growing continuous films over large areas while delaying bilayer formation, is likely transferable to other transition metal dichalcogenide model systems.</abstract>
    <parentTitle language="eng">Frontiers in Physics</parentTitle>
    <identifier type="issn">2296-424X</identifier>
    <identifier type="doi">10.3389/fphy.2021.654845</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Artikelnummer">654845</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Nicolas</firstName>
      <lastName>Braud</lastName>
    </author>
    <author>
      <firstName>Asish K.</firstName>
      <lastName>Kundu</lastName>
    </author>
    <author>
      <firstName>Polina M.</firstName>
      <lastName>Sheverdyaeva</lastName>
    </author>
    <author>
      <firstName>Paolo</firstName>
      <lastName>Moras</lastName>
    </author>
    <author>
      <firstName>Francesca</firstName>
      <lastName>Genuzio</lastName>
    </author>
    <author>
      <firstName>Tevfik Onur</firstName>
      <lastName>Menteş</lastName>
    </author>
    <author>
      <firstName>Andrea</firstName>
      <lastName>Locatelli</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>molybdenum disulfide (MoS2)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>bilayer</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>in situ low-energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>in situ photoemission microscopy (PEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>micro-ARPES (angle-resolved photoelectron spectroscopy)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Au step bunches</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>29535</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>19101</pageFirst>
    <pageLast>19112</pageLast>
    <pageNumber/>
    <edition/>
    <issue>45</issue>
    <volume>126</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2022-11-17</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111)</title>
    <abstract language="eng">Submonolayer coverages of V-oxide on Rh(111) condense during catalytic methanol oxidation into a pattern of macroscopic stripes or islands. Under reaction conditions, a phase separation occurs within the VOx islands that has been studied in a pressure range of 10–6–10–4 mbar with photoemission electron microscopy (PEEM), low-energy electron microscopy (LEEM), microspot-low-energy electron diffraction (μLEED), and microspot-X-ray photoelectron spectroscopy (μXPS). An oxidized outer ring with a (√7 × √7)R19.1° structure coexists with an inner (12 × 12) Moiré-type boundary layer and a reduced core exhibiting a (√3 × √3)R30° Moiré type pattern. The dependence of the substructure on the reaction conditions, on V coverage, and on island size was investigated. With μXPS, the V coverages of the different phases in the VOx islands were determined.</abstract>
    <parentTitle language="eng">The Journal of Physical Chemistry C</parentTitle>
    <identifier type="issn">1932-7455</identifier>
    <identifier type="issn">1932-7447</identifier>
    <identifier type="doi">10.1021/acs.jpcc.2c04174</identifier>
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    <enrichment key="opus.source">publish</enrichment>
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    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Bernhard von</firstName>
      <lastName>Boehn</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Anton</firstName>
      <lastName>Weißbach</lastName>
    </author>
    <author>
      <firstName>Jon-Olaf</firstName>
      <lastName>Krisponeit</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Luca</firstName>
      <lastName>Gregoratti</lastName>
    </author>
    <author>
      <firstName>Matteo</firstName>
      <lastName>Amati</lastName>
    </author>
    <author>
      <firstName>Patrick</firstName>
      <lastName>Zeller</lastName>
    </author>
    <author>
      <firstName>Ronald</firstName>
      <lastName>Imbihl</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Methanol Oxidation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Vanadium Oxide</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Photoemission electron microscopy (PEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Low-energy electron microscopy (LEEM),</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Microspot-low-energy electron diffraction (μLEED)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Microspot-X-ray photoelectron spectroscopy (μXPS)</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>29880</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>17702</pageFirst>
    <pageLast>17710</pageLast>
    <pageNumber/>
    <edition/>
    <issue>12</issue>
    <volume>5</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-01-04</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Growth Mechanism of Single-Domain Monolayer MoS2 Nanosheets on Au(111) Revealed by In Situ Microscopy: Implications for Optoelectronics Applications</title>
    <abstract language="eng">The nucleation and growth of single-layer molybdenum disulfide single-domain nanosheets is investigated by in situ low-energy electron microscopy. We study the growth of micrometer-sized flakes and the correlated flattening process of the gold surface for three different elevated temperatures. Furthermore, the influence of surface step edges on the molybdenum disulfide growth process is revealed. We show that both nanosheet and underlying terrace grow simultaneously by pushing the surface step in the expansion process. Our findings point to an optimized growth procedure allowing for step-free, single-domain, single-layer islands of several micrometers in size, which is likely transferable to other transition-metal dichalcogenides (TMDs), offering a very fine degree of control over the TMD nanosheet structure and thickness.</abstract>
    <parentTitle language="eng">ACS Applied Nano Materials</parentTitle>
    <identifier type="issn">2574-0970</identifier>
    <identifier type="doi">10.1021/acsanm.2c03584</identifier>
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    <enrichment key="opus.doi.autoCreate">false</enrichment>
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    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Jeppe V.</firstName>
      <lastName>Lauritsen</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>in situ methods</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron microscopy and diffraction</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>molybdenum disulfide</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>2D material</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>epitaxial growth mechanism</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Au(111)</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>34307</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>10</pageNumber>
    <edition/>
    <issue/>
    <volume>231</volume>
    <type>articler</type>
    <publisherName>Elsevier BV</publisherName>
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    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2024-10-28</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Hexagons on rectangles: Epitaxial graphene on Ru(10-10)</title>
    <abstract language="eng">Ruthenium is emerging as a promising candidate to replace copper in highly integrated electronics by enabling barrierless metallization in ultrathin interconnects. From this perspective, the study of graphene growth on such surface templates is of paramount importance as a platform for graphene integration in electronic devices. In particular, graphene growth on the Ru (10-10) surface allows selective growth of different graphene orientations, one-dimensional structures, and reduced substrate interaction compared to the well-established hexagonal Ru(0001) substrate. Real-time growth observations using low-energy electron microscopy and micro-diffraction highlight the influence of substrate symmetry on graphene growth, leading to the formation of rectangular islands with distinct zigzag- or armchair-terminated edges. Bilayer formation on Ru(10-10) occurs by nucleation of graphene nanoribbons under the monolayer. Micro-spot angle-resolved photoemission spectroscopy shows significantly less charge-transfer doping in these freestanding, zigzag-terminated bilayer graphene nanoribbons, indicating reduced graphene-substrate interaction and hence more effective decoupling as compared to graphene/Ru(0001). Our results show that the growth of graphene on non-hexagonal substrates opens new pathways for tailoring the graphene-substrate interaction at the interface, and thus the properties of graphene beyond the limits imposed by hexagonal substrates.</abstract>
    <parentTitle language="eng">Carbon</parentTitle>
    <identifier type="doi">10.1016/j.carbon.2024.119600</identifier>
    <identifier type="issn">0008-6223</identifier>
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Lett."},{"key":"10.1016\/j.carbon.2024.119600_bib29","doi-asserted-by":"crossref","first-page":"2654","DOI":"10.1021\/nl901040v","article-title":"Electronic structure of few-layer epitaxial graphene on Ru(0001)","volume":"9","author":"Sutter","year":"2009","journal-title":"Nano Lett."},{"key":"10.1016\/j.carbon.2024.119600_bib30","doi-asserted-by":"crossref","first-page":"238","DOI":"10.1038\/376238a0","article-title":"Why gold is the noblest of all the metals","volume":"376","author":"Hammer","year":"1995","journal-title":"Nature"},{"key":"10.1016\/j.carbon.2024.119600_bib31","doi-asserted-by":"crossref","first-page":"3530","DOI":"10.1039\/b801785a","article-title":"Chemical origin of a graphene moir\u00e9 overlayer on Ru(0001)","volume":"10","author":"Wang","year":"2008","journal-title":"Phys. Chem. Chem. 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Lett."},{"key":"10.1016\/j.carbon.2024.119600_bib46","doi-asserted-by":"crossref","DOI":"10.1088\/1367-2630\/aa53c8","article-title":"Indexing moir\u00e9 patterns of metal-supported graphene and related systems: strategies and pitfalls","volume":"19","author":"Zeller","year":"2017","journal-title":"New J. Phys."},{"key":"10.1016\/j.carbon.2024.119600_bib47","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1595\/147106713X665030","article-title":"Crystallographic properties of ruthenium","volume":"57","author":"Arblaster","year":"2013","journal-title":"Platin. Met. 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    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
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    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
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      <firstName>Giovanni</firstName>
      <lastName>Zamborlini</lastName>
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      <firstName>Cathy</firstName>
      <lastName>Sulaiman</lastName>
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      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
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      <firstName>Mirko</firstName>
      <lastName>Cinchetti</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>angle-resolved photoelectron spectroscopy (ARPES)</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Nanoribbons</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Graphene</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ruthenium</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>30377</id>
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    <title language="eng">Oxygen Storage by Tin Oxide Monolayers on Pt3Sn(111)</title>
    <abstract language="eng">The high performance of platinum–tin catalysts for oxidation reactions has been linked to the formation of tin oxides at the metal surface, but little is known about the structure of these oxides or the chemical behavior that determines their catalytic properties. We show here how surface oxides on Pt3Sn(111) incorporate oxygen at the metal interface, which may be subsequently removed by reaction with CO. The storage mechanism, where oxygen uptake occurs without loss of interfacial Pt–Sn bonds, is enabled by the peculiar asymmetrical coordination state of Sn2+. O atoms are bound at pocket sites in the 2D oxide sheet between these outward-buckled Sn atoms and metallic Sn in the alloy surface below.</abstract>
    <parentTitle language="eng">The Journal of Physical Chemistry. C</parentTitle>
    <identifier type="issn">1932-7447</identifier>
    <identifier type="issn">1932-7455</identifier>
    <identifier type="doi">10.1021/acs.jpcc.2c09041</identifier>
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    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Lindsay R.</firstName>
      <lastName>Merte</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Nicolas</firstName>
      <lastName>Braud</lastName>
    </author>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Malthe Kjær</firstName>
      <lastName>Bisbo</lastName>
    </author>
    <author>
      <firstName>Harald J.</firstName>
      <lastName>Wallander</lastName>
    </author>
    <author>
      <firstName>Jon-Olaf</firstName>
      <lastName>Krisponeit</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Bjørk</firstName>
      <lastName>Hammer</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Edvin</firstName>
      <lastName>Lundgren</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Oxygen storage</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>microprobe low-energy electron diffraction (μ-LEED)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>scanning tunneling microscopy (STM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>GOFEE algorithm</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>30499</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>732</volume>
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    <completedDate>2023-03-21</completedDate>
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    <title language="eng">Cleaning and tailoring the Pt3Sn(111) surface for surface experiments</title>
    <abstract language="eng">The cleaning process of the bimetallic Pt3Sn(111) surface has been studied by means of low-energy electron microscopy (LEEM), microspot low-energy electron diffraction (-LEED), and X-ray photoemission electron microscopy (XPEEM). Different cleaning procedures, performed under ultra-high vacuum conditions (UHV), including sputtering with argon ions and repeated cycles of annealing up to 1500 K were investigated. In this work, we show that a clean Pt3Sn(111) surface of high structural quality with a sharp and brilliant (2 × 2) bulk reconstruction in LEED as well as a perfectly smooth surface with terraces of micron size can be achieved by sputtering, annealing at very high temperatures, followed by a subsequent slow (0.09 K/s) and careful cooling procedure. Additionally, we show the possibility of tailoring the Sn concentration in the topmost layers of Pt3Sn(111) as a function of annealing temperature and subsequent cooling rate. Structural changes of the surface are induced by Sn segregation combined with a surface order–disorder transition at 1340 K. Moreover, two new surface reconstructions depending on the cooling rate are reported.</abstract>
    <parentTitle language="eng">Surface Science</parentTitle>
    <identifier type="issn">0039-6028</identifier>
    <identifier type="issn">1879-2758</identifier>
    <identifier type="doi">10.1016/j.susc.2023.122281</identifier>
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    <enrichment key="Artikelnummer">122281</enrichment>
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    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Nicolas</firstName>
      <lastName>Braud</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Edvin</firstName>
      <lastName>Lundgren</lastName>
    </author>
    <author>
      <firstName>Lindsay R.</firstName>
      <lastName>Merte</lastName>
    </author>
    <author>
      <firstName>Harald J.</firstName>
      <lastName>Wallander</lastName>
    </author>
    <author>
      <firstName>Jon-Olaf</firstName>
      <lastName>Krisponeit</lastName>
    </author>
    <author>
      <firstName>Andrea</firstName>
      <lastName>Locatelli</lastName>
    </author>
    <author>
      <firstName>Tevfik Onur</firstName>
      <lastName>Mentes</lastName>
    </author>
    <author>
      <firstName>Matteo</firstName>
      <lastName>Jugovac</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Pt3Sn</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Low-energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Platinum</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Tin</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Cleaning</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Alloy</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>30915</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>7</pageNumber>
    <edition/>
    <issue/>
    <volume>250</volume>
    <type>articler</type>
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    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-05-15</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Unraveling van der Waals epitaxy: A real-time in-situ study of MoSe2 growth on graphene/Ru(0001)</title>
    <abstract language="eng">In the present work we investigate the growth of monolayer MoSe2 on selenium-intercalated graphene on Ru(0001), a model layered heterostructure combining a transition metal dichalcogenide with graphene, using low energy electron microscopy and micro-diffraction. Real-time observation of MoSe2 on graphene growth reveals the island nucleation dynamics at the nanoscale. Upon annealing, larger islands are formed by sliding and attachment of multiple nanometer-sized MoSe2 flakes. Local micro-spot angle-resolved photoemission spectroscopy reveals the electronic structure of the heterostructure, indicating that no charge transfer occurs within adjacent layers. The observed behavior is attributed to intercalation of Se at the graphene/Ru(0001) interface. The unperturbed nature of the proposed heterostructure therefore renders it as a model system for investigations of graphene supported TMD nanostructures.</abstract>
    <parentTitle language="eng">Ultramicroscopy</parentTitle>
    <identifier type="issn">0304-3991</identifier>
    <identifier type="issn">1879-2723</identifier>
    <identifier type="doi">10.1016/j.ultramic.2023.113749</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Relation">871124</enrichment>
    <enrichment key="BTUfunderName">Horizon 2020</enrichment>
    <enrichment key="Artikelnummer">113749</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Nicolas</firstName>
      <lastName>Braud</lastName>
    </author>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <author>
      <firstName>Matteo</firstName>
      <lastName>Jugovac</lastName>
    </author>
    <author>
      <firstName>Tevfik Onur</firstName>
      <lastName>Menteş</lastName>
    </author>
    <author>
      <firstName>Andrea</firstName>
      <lastName>Locatelli</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Graphene</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>transition metal dichalcogenides (TMDs)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>angle-resolved photoemission spectroscopy (ARPES)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Heterostructures</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low  energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low  energy electron diffraction (LEED)</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>30950</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume>250</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-05-23</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Preparation and stability of the hexagonal phase of samarium oxide on Ru(0001)</title>
    <abstract language="eng">We have used low-energy electron microscopy (LEEM), micro-illumination low-energy electron diffraction (µLEED) supported by ab initio calculations, and X-ray absorption spectroscopy (XAS) to investigate in-situ and in real-time the structural properties of Sm2O3 deposits grown on Ru(0001), a rare-earth metal oxide model catalyst. Our results show that samarium oxide grows in a hexagonal A-Sm2O3 phase on Ru(0001), exhibiting a (0001) oriented-top facet and (113) side facets. Upon annealing, a structural transition from the hexagonal to cubic phase occurs, in which the Sm cations exhibit the +3 oxidation state. The unexpected initial growth in the A-Sm2O3 hexagonal phase and its gradual transition to a mixture with cubic C-Sm2O3 showcases the complexity of the system and the critical role of the substrate in the stabilization of the hexagonal phase, which was previously reported only at high pressures and temperatures for bulk samaria. Besides, these results highlight the potential interactions that Sm could have with other catalytic compounds with respect to the here gathered insights on the preparation conditions and the specific compounds with which it interacts.</abstract>
    <parentTitle language="eng">Ultramicroscopy</parentTitle>
    <identifier type="issn">0304-3991</identifier>
    <identifier type="issn">1879-2723</identifier>
    <identifier type="doi">10.1016/j.ultramic.2023.113755</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Relation">Postdoc Network Brandenburg</enrichment>
    <enrichment key="RelationnotEU">PNB grant</enrichment>
    <enrichment key="BTUfunderNamenotEU">Postdoc Network Brandenburg</enrichment>
    <enrichment key="Artikelnummer">113755</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Emilia</firstName>
      <lastName>Pożarowska</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Linus</firstName>
      <lastName>Pleines</lastName>
    </author>
    <author>
      <firstName>Moritz</firstName>
      <lastName>Ewert</lastName>
    </author>
    <author>
      <firstName>Mauricio J.</firstName>
      <lastName>Prieto</lastName>
    </author>
    <author>
      <firstName>Liviu Christian</firstName>
      <lastName>Tănase</lastName>
    </author>
    <author>
      <firstName>Lucas de</firstName>
      <lastName>Souza Caldas</lastName>
    </author>
    <author>
      <firstName>Aarti</firstName>
      <lastName>Tiwari</lastName>
    </author>
    <author>
      <firstName>Thomas</firstName>
      <lastName>Schmidt</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Eugene</firstName>
      <lastName>Krasovskii</lastName>
    </author>
    <author>
      <firstName>Carlos</firstName>
      <lastName>Morales</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Samarium oxide (Sm2O3)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>low-energy electron microscopy (LEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>X-ray photoemission electron microscopy (XPEEM)</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Facets</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Epitaxy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Hexagonal phase</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
  <doc>
    <id>32139</id>
    <completedYear/>
    <publishedYear>2023</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>16158</pageFirst>
    <pageLast>16167</pageLast>
    <pageNumber/>
    <edition/>
    <issue>24</issue>
    <volume>13</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2023-12-06</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Dynamic Behavior of Tin at Platinum Surfaces during Catalytic CO Oxidation</title>
    <abstract language="eng">Platinum–tin surfaces are active for CO oxidation, but their activity and the effects of tin oxide phases that form under reaction conditions are poorly understood. We have studied surface alloys of tin prepared on platinum single crystals during catalytic CO oxidation using near-ambient-pressure X-ray photoemission spectroscopy. On the flat terraces of Sn/Pt(111), a wetting layer of Sn(II) surface oxide forms, while on the stepped Sn/Pt(223) surface, 3D clusters of Sn(IV) oxide are formed. Oxidation of tin by O2 competes with the reduction of the oxides by CO under reaction conditions. Oxides that do not completely cover the surface can be reduced to metallic tin, while a fully covering layer of Sn(II) oxide cannot, showing the importance of oxide edge sites for the reduction process. The samples where 2D oxide layers are formed show a higher CO oxidation activity than for pure platinum at low temperatures, while the Sn(IV) oxide clusters on the stepped surfaces do not affect the measured CO oxidation rate. We therefore identify 2D Sn(II) oxide as an active phase for CO oxidation. While oxide island edges appear to make only minor contributions to conversion under these conditions, reactions at these sites play a major role in determining the phases present and their transformations.</abstract>
    <parentTitle language="eng">ACS Catalysis</parentTitle>
    <identifier type="issn">2155-5435</identifier>
    <identifier type="doi">10.1021/acscatal.3c04657</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="Publikationsweg">Open Access</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="Fprofil">1 Energiewende und Dekarbonisierung / Energy Transition and Decarbonisation</enrichment>
    <enrichment key="Fprofil">4 Künstliche Intelligenz und Sensorik / Artificial Intelligence and Sensor Technology</enrichment>
    <author>
      <firstName>Harald J.</firstName>
      <lastName>Wallander</lastName>
    </author>
    <submitter>
      <firstName>Karsten</firstName>
      <lastName>Henkel</lastName>
    </submitter>
    <author>
      <firstName>Dorotea</firstName>
      <lastName>Gajdek</lastName>
    </author>
    <author>
      <firstName>Stefano</firstName>
      <lastName>Albertin</lastName>
    </author>
    <author>
      <firstName>Gary</firstName>
      <lastName>Harlow</lastName>
    </author>
    <author>
      <firstName>Nicolas</firstName>
      <lastName>Braud</lastName>
    </author>
    <author>
      <firstName>Lars</firstName>
      <lastName>Buß</lastName>
    </author>
    <author>
      <firstName>Jon-Olaf</firstName>
      <lastName>Krisponeit</lastName>
    </author>
    <author>
      <firstName>Jan Ingo</firstName>
      <lastName>Flege</lastName>
    </author>
    <author>
      <firstName>Jens</firstName>
      <lastName>Falta</lastName>
    </author>
    <author>
      <firstName>Edvin</firstName>
      <lastName>Lundgren</lastName>
    </author>
    <author>
      <firstName>Lindsay R.</firstName>
      <lastName>Merte</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>operando</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>CO oxidation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>platinum</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>tin</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>oxides</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>alloys</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>stepped surfaces</value>
    </subject>
    <collection role="institutes" number="1503">FG Angewandte Physik und Halbleiterspektroskopie</collection>
  </doc>
</export-example>
